De_luxe has 4 wins and 12 points after the fifth round.
Sanin has 3 wins and 1 loss.
Georg has 2 wins and 2 losses.
Nedved46 has 1 win and 3 losses.
Korovka1987 has 1 win and 3 losses.
Chemist_Hp has 1 win and 3 losses.
And the fifth round:
De_luxe - Chemist_Hp
Sanin - Korovka1987
Georg - Nedved46
De_luxe and Sanin have no tournament motivation, and one of them, or both, throw their games to the two underdogs, without even playing or submitting reports (no-show on Odd or simply giving up the tech win), and still remain in the top two spots.
If only one throws, the other's opponent is out of luck, as Georg and Nedved46 draw.
If both throw, the underdogs have a higher KB (Knowledge Bonus) than Nedved46 and Georg, and the fifth participant is determined in this match.
If no one throws, Georg and Nedved46 draw and both advance.
That's the math we get.
P.S. All events are fictional. Any coincidences are purely accidental :D